CONTROL PANEL INTERIOR
The optional control panel has a twelve-lamp moni toring system. The following describes each lamp function.
Generator AC Voltage Regulator
The solid-state regulator (VRAS-2) controls AC out put voltage from the generator at a predetermi:ied level regardless of load. Voltage reguiation is plus or minus three percent from no load to full load. Ran dom voltage variation is p!us or minus one percent for constant loads.
• RUN (green) lamp comes on when both starter circuits are opened after unit starting. • PRE LO OIL PRES (yellow) indicates engine oil pressure is marginally low.
Engine Control Module
:: PRE H! ENG TEMP (yellow) indicates engine temperature is marginally high.
Electronic and relay components of the er.gine mor:i torlng circuit are on a circuit.board assembly. Sensor inputs (Figure 2) are connected by the wiring har:iess to plug connectors on the board. The cont:c: �oduie provides the following functions of unit protection.
• LO Oll PRES (red) indicates engine has shut down because of critically low oil pressure. • HI ENG TEMP (red) indicates engine has shut down because of critically high temperature.
• Overcrank- limits engine cranking to 75 seconds. If engine fails to start, the module lights a fault lamp and opens the cranking circuit. The cycle cranking option allows three 15-second cranking cycles with two 15-second rest periods on the 12-lamp control.
• OVERSPEED (red) indicates engine has shut down because of excessive speed. • OVERCRANK (red) indicates the starter has been locked out because of excessive cranking time.
• Overspeed - shuts down the engine immediately if overspeed occurs and lights a fault lamp. The sen sor switch is mounted in the end bell on the gener ator shaft. It is factory adjusted to shut down 60 hertz units at 2200 ± 100 r/min, 50 hertz units at 1900 ± 100 r/min.
• FAULT 1 (red) an undedicated fault. May be factory programmed as a shutdown or non-shutdown, and as a timed or non-timed fault. (Normally set for timed shutdown). • FAULT 2 (red) S ame features as Fault 1 (Normally set for timed shutdown).
• Low Oil Pressure - shuts down the engine imme diately if oil pressure drops below 14 psi (97 kPa) and lights a fault lamp. The fault is time delayed about 10 seconds foliowing starter disconnect and inhibited during cranking. The delay allows oi: pressure to rise to normal before the electronic control module monitors this system.
• LOW ENG TEMP (yellow) engine temperature is marginally low for starting. Indicates inoperative coolant heater. • LO FUEL (yellow) indicates fuel supply is margi nally low.
A pre-low oil pressure sensor and lamp (used with optional 12-lamp system) provides an alarm that oil pressure is marginally low (20 psi/138 kPa or less). The cause should be found and corrected as soon
• SWITCH OFF (flashing red) indicates generator set is not in automatic start operation mode.
as possible.
7
